It depends how much lean angle and throttle you're applying at the time.
You can hit poor surfaces surprisingly hard, the tyres are usually better than you expect and the chassis can cope with a lot of slithering about. Disaster comes when that bit of a slide makes you crap yourself and slam the throttle shut (highside... hedge...) or brake (don't, lowside, hedge...).
What you need si decisive action, don't dither your way through it. Either stand the bike up and brake hard and have another go at turning in, or go through it on a light throttle and expect a possible bit of scrabbling from the back end. You can get it very out of shape and not die so long as you don't panic.
And when you get used to it such surfaces can be very entertaining
... but only if you're awake and paying attention and you see them first!